package com.youliao.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

/**
 * @Author Dali
 * @Date 2021/07/06 下午 6:28
 * @Version 1.0
 * @Description
 */
@Service
public class PaymentService {
    //================服务降级================

    /**
     * 正常访问 肯定ok
     *
     * @param id
     * @return
     */
    public String paymentInfo_OK(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "   paymentInfo_OK,id：  " + id + "\t" + "哈哈哈";
    }

    //服务降级：5秒以内走正常的逻辑，（业务逻辑需要3秒）超过5秒，则出现超时的错误（或者计算异常），我们走兜底方案：paymentInfo_TimeOutHandler
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")  //峰值：3秒
    })
    public String paymentInfo_TimeOut(Integer id) {
        //int age = 10/0; //计算异常
        //暂停毫秒
        try {
            TimeUnit.MILLISECONDS.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：" + Thread.currentThread().getName() + "  id：  " + id + "\t" + "哈哈哈" + " 耗时(秒)";
    }

    public String paymentInfo_TimeOutHandler(Integer id) {
        return "线程池：" + Thread.currentThread().getName() + "   8001系统繁忙或者运行报错,请稍后再试,id：  " + id + "\t" + "/(ㄒoㄒ)/~~";

    }

    //===================服务熔断====================
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"),  //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),   //请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"),  //时间范围
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"), //失败率达到多少后跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("*****id 不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();      //等价于  UUID.randomUUID().toString()

        return Thread.currentThread().getName() + "\t" + "调用成功,流水号：" + serialNumber;
    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id 不能负数，请稍候再试,(┬＿┬)/~~     id: " + id;
    }
}
